CRYSTALLOGRAPHIC STRUCTURE AND ORIENTATION OF THE $gamma$' PHASE IN FOUR COMMERCIAL NICKEL-BASE ALLOYS

Technical Report · Mon Jul 01 04:00:00 EDT 1957

OSTI ID:4324796

Amy, J A; Bigelow, W C

Selected area electron diffraction patterns have been obtained from matrix precipitate particles isolated by the extraction-replica technique from aged specimens of four commercial nickel-base alloys, Inconcel-X, Waspalloy, M- 252, and Udimet, which contain titanium and aluminum as hardening agents. From these patterns the matrix particles have been conclusively identified as the gamma ' phase. It has also been shown that the ordered, or superlattice, structure reported for this phase in simpler alloy systems occurs also in these complex alloys, and that the particles develop with a high degree of preferred crystallographic orientation relative to the matrix lattice. Variations in the size, shape, and distribution of the particles in specimens of the four alloys aged 100 hours at 1400 deg F are also evident, and appear to be related to the titanium and aluminum content of the alloys. (auth)

• Research Organization: Michigan. Univ., Ann Arbor. Engineering Research Inst.
• NSA Number: NSA-12-002934
• OSTI ID: 4324796
• Report Number(s): WADC-TN-57-247; AD-130834
• Country of Publication: United States
• Language: English

Related Subjects

ALLOY-M-252
ALUMINUM ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
CRYSTALS
DIFFRACTION
DISTRIBUTION
ELECTRONS
GRAIN SIZE
HARDNESS
INCONEL ALLOYS
LATTICES
MINERALOGY, METALLURGY, AND CERAMICS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NIOBIUM ALLOYS
PARTICLES
PHASE DIAGRAMS
QUANTITY RATIO
TITANIUM ALLOYS
UDIMET
VARIATIONS
WASPALOY